영산강유역 청동기시대 분묘는 지석묘로 대표되는데 이에 대한 연구는 활발히 진행되었으나 그 외 청동기시대 분묘에 대한 연구는 전무한 것으로 볼 수 있다. 이는 지상에 노출되어 육안으로 확인 가능한 지석묘의 표지적 특성에 따른 것으로 다른 형태의 분묘는 지하에 위치하여 발굴조사를 통해서만 확인 가능하기 때문에 인지도의 차이가 발생한다. 영산강유역 지석묘는 전기부터 축조되며, 주로 석곽형 구조를 보이지만 최근 석관묘와 유사한 석관형 구조가 많이 확인되고 있어 주목된다. 영산강유역에서 지석묘 하부구조로 석관형 구조가 축조되기 시작한 것은 송국리문화가 유입되는 시기와 맞물린다. 영산강유역은 청동기시대 전기부터 여러 지역으로부터 다양한 문화가 유입되는데 중기에는 금강ㆍ 만경강유역의 송국리문화가 호남 전역으로 확산되면서 영산강유역도 송국리문화의 중심분포권에 포함된다. 분묘 또한 송국리형묘제인 석관묘, 석개토광묘, 옹관묘가 축조되기 시작하지만 지석묘에 비해 활발하게 축조되지는 않는다. 따라서 영산강유역 청동기시대 중기의 문화상은 주거지는 송국리문화, 분묘는 지석묘문화를 특징으로 한다. 지석묘의 경우 상징성이 강한 上石은 큰 변화없이 유지되면서 하부구조는 송국리문화의 영향으로 石棺이 적극적으로 채용되기 시작한다. 영산강유역은 지석묘라는 전통 묘제를 기반으로 상당한 결속력을 가졌던 것으로 볼 수 있으며 강한 유대감을 바탕으로 영산강유역 지석묘사회라는 독자적 문화권을 형성하게 된다. 이러한 전통은 점토대토기문화가 유입된 이후까지도 한동안 지속되는데 이후 철기문화가 유입되면서 전통적 지석묘사회는 쇠퇴하고 옹관묘라는 새로운 매장관습을 받아 들여 영산강유역만의 독특한 옹관고분사회로 발전하는 배경이 된다.

2-브로모메틸-1,3-디옥솔란을 이용한 2-에티닐피리딘의 중합을 통하여 측쇄에 디옥솔란 치환기를 갖는 새로운 이온성 공액구조 고분자를 합성하였다. 별도의 촉매없이도 중합반응이 잘 진행되어 높은 수율의 중합체를 얻을 수 있었다(76%). 합성한 고분자의 분자구조를 여러 가지 분석장비를 사용하여 분석한 결과 1,3-디옥솔란 부분을 갖는 설계한 공액구조 고분자임을 확인하였다. 고분자의 적외선분광분석 스펙트럼에서는 2110 cm-1 와 3293 cm-1에 서 관찰되었던 2-에티닐피리딘의 아세틸렌 특성피크를 보여주지 않는 대신 1620 cm-1 인근에서 공액이중결합의 탄소-탄소 이중결합의 특성 피크를 보다 강하게 보여주었다. 합성한 고분자의 전기전도도 및 전기-광학적 특성을 측정하고 분석하였다. 요오드로 도핑한 고분자의 전기전도도는 1.82 x 10-3 S/cm 였다.

The present study attempted to verify the mediating effect of social capital in the relationship between cultural capital and academic achievement for university students. Toward this end, the study included survey data collected from 270 students from national universities in the analysis. The collected data was analyzed using the SPSS 22.0 and AMOS 22.0 statistical programs. The results of the present study can be summarized as follows. First, there was a significant positive correlation between the overall variables of cultural capital, social capital, and academic achievement. In particular, the greatest correlation was exhibited between social capital and academic achievement with regard to the relationship between dependent variables. Second, social capital appeared to fully mediate the relationship between cultural capital and academic achievement. This implies that students can increase their academic achievement by increasing their level of social capital, which is slightly more fluid than cultural capital in an embodied state, which is acquired while being naturally exposed to such a culture since childhood.

The Sijeon (Licensed Markets) legally permitted by the government along the Jongno and the Namdaemunro Avenues played a central commercial role in Hanyang. However, after the opening of the port in the late Joseon era, the Licensed Markets suffered a blow and declined due to the introduction of a new product of civilization and the appearance of foreign merchants. Although the Licensed Markets, which have been maintained without major changes for a long time, have played a major role in the urban spatial structure, the exact location has not been still determined, and researches until now has remained limited for such that. In this study, based on the 1912 land survey records, the location of the Licensed Markets pre-and post- 1910 is identified, and the spatial change of the dismantling process is investigated.

This is a study on the structural changes of the tumulus and causes setting up a Sabangseok at the front of the tumulus at the royal tomb in the JoSeon dynasty, during the 17th~18th centuries. The Sabangseok was first used in the tumulus of Mongnueng(穆陵) in 1630. It is a multipurpose stone for boundary, foundation of the tumulus and blocking the sliding down of the tumulus. It was set up, when constructing a Yeongneung(寧陵) in 1673. But the vast spill of tumulus soil made it improve structure of the Sabangseok. Consequently, when the Yeongneung was re-constructed, the structure of the tumulus was fundamentally improved. The soil layer on the lime of the subterranean chamber became eliminated. Also the lime of the tumulus and the lime of the subterranean chamber became a united structure. The Sabangseok was still used until 1757 on account of precedents, although it would become unnecessary after structural improvement of the tumulus in 1673. In 1757, Yeongjo(The 21th monarch of the Joseon Dynasty) commanded repeal on the use of the Sabangseok, when constructing the Hongneung(tomb of Queen Jeongseong) . The decision and discussions about abolition on the use of the Sabangseok was recorded in Gukjosangryebopyeon.

Along with the increase in demand for rescue services, the types of rescue services are also diversifying. Accordingly, rescue workers are exposed to various unpredictable dangerous situations, and the possibility of safety accidents is increasing, so the need for systematic management of safety accidents by rescue teams is emerging. It is necessary to present a roadmap for improving the quality of rescue services. An integrated technology roadmap tool that can be used immediately to improve structural quality was applied. The driving elements of the roadmap are composed of three elements that constitute the improvement of structural quality. It can be divided into safety management, professional competence and other (policy support) fields. This study intends to present a long-term and short-term roadmap by dividing it into safety management, professional competency, and other (policy support) fields.

An experimental study was carried out to evaluate the shear performance at the interface composed of structural laminates and concrete. The main variables are the number of CLT layers and the shape of the shear connector. The number of CLT layers consisted of 3 and 5 layers. A total of 6 test specimens for shear performance evaluation were prepared in the form of a shear connector, a direct screw type and a vertically embedded type. As a result of the experiment, similar behavior was shown in all specimens, regardless of the number of layers, including direct screw type (SC series) and vertically embedded type (VE series). The behavior at the joint surface was damaged due to the occurrence of initial shear cracks, expansion of shear groove cracks, and splaying at the interface after the maximum load.After the maximum load, the shear strength decreased gradually due to the effect of the shear connector. It can be seen that the shear strength of all specimens is determined by shear and compression stress failure of concrete at the interface of the notch joint.

Butterfly valves have been used to control the flow rate of various fluids in many industries because it have unique manageability compare to other valves. However, when a defect occurs due to the failure of the backlash of the power transmission part and the pin breakage of the butterfly valve due to the absence of the design capability of the valve, it is difficult to analyze the cause and maintain it. In this paper, a study was conducted to secure the reliability of the valve by performing structural analysis and analysis using a 3D model of the product to manufacture a high-quality valve.

본 연구에서는 장기간 운영된 양식장에 휴지기가 주어졌을 때, 양식장 주변 퇴적 환경에서 나타나는 회복상태를 규명하고자 하였으며, 이를 위해 경남 통영의 수하식 굴양식장 일대에서 대형저서다모류 군집을 조사하였다. 2016년 7월부터 2018년 9월까지 20년 간 운영된 후 폐쇄된 양식장(FF), 양식장의 이동으로 새롭게 설치된 양식장(NF), NF와 인접한 비교대상의 굴양식장(CF), 그리고 양식시설이 없는 두 개의 대조지역(Con1, Con2) 등 5개 정점에서 현장조사를 수행하였다. 출현종수와 서식밀도는 여름철에 감소하고 늦가을철 부터 증가하는 계절 변동을 보였으며, 양식장 정점들이 비양식장 정점들에 비해 높았다. 출현종의 상위우점종은 비양식장 정점에서는 Paraprionospio patiens, 양식장 정점에서는 Capitella capitata로 차이를 보였으나, 두 종 모두 유기물이 심한 지역에서 출현하는 잠재적 유기물 오염지시종으로 조사지역 저서환경의 유기물 오염이 상당히 진행되었음을 나타내었다. 다변량분석 결과, FF가 Con1과 군집구조가 유사한 수준으로 변화하였지만 Con1 이상의 상태로 회복을 나타내지 않았다.

The prospect of the new railway construction has led to resistance from residents, partly based on noise and vibration issues. Particularly, as tracks often pass closely to residential dwellings, constructors are then required to take account of noise and vibration. So the prediction of noise and vibration for train is very important thing. The train noise and vibration nearby the elevated railway make one specific issue. For the elevated railway, this paper concerns the rolling noise by the wheel/rail and the structure-borne noise by the bridge. Based on the results, this paper proposes the source model of elevated structure-borne noise and the calculation model for elevated railway noise. Also prediction model is presented with rolling noise and elevated structure noise which are calculated by considering the power level of a source for one-third octave band, ground absorption and barrier deflection. A lot of empirical data is needed to predict the noise and vibration. And one of the best ways to control the wayside noise is to analyze the noise level.